User manual MARSHALL JMD 1

[. . . ] Owners Manual Overview The Marshall R&D team have always kept a keen eye (and of course their ears) on new technologies, and have implemented them when they were right for the product. Our number one rule - never sacrifice tone for technology's sake. Only now have all the components, state-of-the-art technology and nearly 50 years of experience come together to create this exciting amplifier range. The JMD:1 is the result of a unique collaboration with our friends at SoftubeTM, leading to a true digital pre-amp, integrated into a product that I am proud to see the Marshall name on. [. . . ] The tonal character of the 1974 has been matched perfectly with the 1959's EQ section and is ideal for classic rhythm sounds. + Remember: When a channel preset is recalled, the physical position of the pre-amp and FX section controls are unlikely to match the original settings used to program the recalled preset. The front panel switches will automatically be updated. To Store - Dial in the tone and FX settings you require, when happy, select which channel to store your sound into by holding that channel switch down for more than 1 second. All channel lights will flash to indicate your settings have been successfully stored. Based on the mighty JVM Series' Clean channel, this pre-amp option produces one of the brightest clean tones ever to have come from a Marshall. The tight, controlled and well balanced tone provides plenty of clarity and punch, thanks to a tone network that lies before the channel's main gain stage. Pre-amp Topology: Single ECC83 pre-amplifier stage driving a classic Marshall three band EQ feeding another ECC83 gain stage directly coupled to an ECC83 cathode follower 4 The first of the JMD:1's new sounds, this setting is designed to produce a totally flat response, letting the natural tone of your guitar and the JMD:1's power Clean 4. Natural Pre-Amp: JMD:1 Pre-amp Topology: ECC83 pre-amplifier stage followed by a tone shaping circuit with tuned bass and a slight low mid cut feeding into an ECC83 gain stage followed by a three band EQ. Straight out of the JMP-1 tonal vault comes this well rounded tone with distinctive mid characteristics, making this option ideal for rich chords and softer tones. Increasing the gain results in clean lead lines with a hint of vintage style distortion. Pre-amp Topology: This pre-amp is the combination of a 1974 pre-amp and power amp used as a pre-amp stage: ECC83 pre-amplifier stage with preset tone and gain control feeding another ECC83 gain stage directly coupled to an ECC83 cathode follower driving a classic Marshall three band EQ followed by an 18 Watt EL84 push pull amplifier with no feedback driving a dummy load. Classic Pre-Amp: JCM800 2203 5 Raw, rough and ready ­ what more would you expect from a pre-amp based on the legendary JCM800 2203!An upfront focussed sound which embodies the term `crunch'. JMD:1 Front Panel continued 2 5 2 7 8 Ext FX ENGLISH Full - 8 Deep - 7 Classic - 6 Vintage - 5 Natural - 4 Classic - 3 Full - 2 Classic 9 10 - Modern 11 - Deep 1 12 - Detuned 13 - Deep 14 1 - Solid 15 - Classic 1 Modern 16 - Modern Mod 3-6. . 1 3 4 OVERDRIVE SECTION 9-12 5 6 9 10 Pre-amp Topology: ECC83 pre-amplifier stage feeding into a gain control with treble boost followed by an ECC83 pre-amplifier clipping stage then into an ECC83 gain stage directly coupled to an ECC83 cathode follower, then to a classic Marshall three band EQ. Crunch 7. Deep Pre-Amp: Haze40 Settings: Normal Channel, Boost and Bright switches engaged. A satisfyingly warm tone resembling the Marshall Haze40 with both its Boost and Bright switches engaged. Produces a darker overdrive with a smooth edge and enhanced bottom-end clout. The JMD:1's forefather, the JMP-1 provides the tonal backbone to this pre-amp option, which is based on the latter's OD2 channel. This setting delivers an aggressive and focussed sound, yet remains smooth and fluid with distinctive mids. Overdrive 9. Classic Pre-Amp: JMP-1 Settings: OD2 Pre-amp Topology: The signal is fed into a distortion / booster circuit then into an ECC83 pre-amplifier stage followed by an ECC83 gain stage driving a three band EQ. Modern Pre-Amp: JVM410H Settings: Crunch Channel in Red Mode Pre-amp Topology: ECC83 pre-amplifier stage with a slight mid boost feeding into an ECC83 gain stage directly coupled to an ECC83 cathode follower, then to a classic Marshall three band EQ. Detuned Pre-Amp: Mode Four Settings: OD2 Channel ­ Scoop on with Tone Matrix set to 3 Pre-amp Topology: A boost pedal driving a custom filter plugged into an ECC83 pre-amplifier stage followed by a treble boosting tone shaping circuitry and the gain control feeding into an ECC83 configured as a clipper, then into an ECC83 gain stage directly coupled to a cathode follower driving a classic Marshall three band EQ. Another fantastic tonal experiment, bringing together the raw might of the JCM800 2203 and Bluesbreaker FX pedal set to Boost. A custom filter enhances the bass and reduces the mids, with the blend of '80s roar and '70s bottom-end delivering hot-rodded scooped tones as they should be. Lead 13. Deep Pre-Amp: Bluesbreaker II + Haze40 Settings: Bluesbreaker II in Boost mode with Drive set to max, plus Haze Normal Channel with Boost and Bright switches on. LEAD SECTION 13-16 A 'boosted' Bluesbreaker pedal and a Haze40 combo with Boost and Bright switches engaged have been combined to produce a truly deep and growling tone. The warm sustain of this pre-amp makes it ideal for soaring solo tones. Pre-amp Topology: A boost pedal driving an ECC83 pre-amplifier stage followed by a gain control, then into an ECC83 gain stage directly coupled to a cathode follower driving a classic Marshall three band EQ. Solid Pre-Amp: Original Guv'nor Distortion pedal The 1974 makes a return here as a full-fat rhythm tone with extra clarity in the mids. [. . . ] To exit this mode without storing a preset, press the Footswitch / MIDI Program switch again. MIDI The JMD:1 can store and recall 128 presets via program change commands received from its MIDI IN socket. To Store - Dial in the tone you require, when happy, press the Footswitch / MIDI Program switch twice, the LED will flash until a valid MIDI program change command is received. On reception of a MIDI program change command the amplifier stores the current settings in the MIDI program number received. The JMD operates in OMNI mode; it will respond to MIDI program change messages transmitted on any MIDI channel. [. . . ]